http://www.nikkei.com/article/DGXNASFS08046_Y3A700C1MM8000/

http://kanz.jp/hanrei/detail/83393/

http://www.zenbenkyo.or.jp/service/hosyakuhosyou.html

http://www.47news.jp/CN/201307/CN2013070801001899.html

http://bylines.news.yahoo.co.jp/maedatsunehiko/20130707-00026133